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Klarinet Archive - Posting 000082.txt from 2003/06

From: GrabnerWG@-----.com
Subj: Re: [kl] "Blow-out", was: Buffet
Date: Mon, 2 Jun 2003 16:40:19 -0400

In a message dated 6/2/2003 10:34:38 AM Eastern Standard Time, mark.thiel@-----.com writes:

> (Benade) saying that sharp corners cause undesirable
> turbulence in the airflow. He claimed that reproductions of period
> instruments often didn't play and sound as good as the originals because the tone holes were machined as sharp as modern industrial technology could make them, while
> some of the rounding on the period instruments may have been design intent rather
> than solely the effect of years of wear.>>

Sharp edges do cause an "edge" in the sound which many find undesirable. WHen I make barrels, clarinet extensions, etc. I do "round" tone holes and tenon ends.
>
> Anyway, is it possible that rounding caused by overenthusiastic swabbing
> etc. can make the note that uses that particular tonehole go
> sharp or maybe modify the bore enough to affect notes further down?>>

That's the theory. Lee Gibson has stuff to sy about that in his book "Clarinet Acoustics"

Walter Grabner

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